TY - JOUR
AU1 - LAI (赖天伟), Tianwei
AU2 - FU (付豹), Bao
AU3 - CHEN (陈双涛), Shuangtao
AU4 - ZHANG (张启勇), Qiyong
AU5 - HOU (侯予), Yu
AB - The EAST superconducting tokamak, an advanced steady-state plasma physics experimental device, has been built at the Institute of Plasma Physics, Chinese Academy of Sciences. All the toroidal field magnets and poloidal field magnets, made of NbTi/Cu cable-in-conduit conductor, are cooled with forced flow supercritical helium at 3.8 K. The cryogenic system of EAST consists of a 2 kW/4 K helium refrigerator and a helium distribution system for the cooling of coils, structures, thermal shields, bus-lines, etc. The high-speed turbo-expander is an important refrigerating component of the EAST cryogenic system. In the turbo-expander, the axial supporting technology is critical for the smooth operation of the rotor bearing system. In this paper, hydrostatic thrust bearings are designed based on the axial load of the turbo-expander. Thereafter, a computational fluid dynamics-based numerical model of the aerostatic thrust bearing is set up to evaluate the bearing performance. Tilting effect on the pressure distribution and bearing load is analyzed for the thrust bearing. Bearing load and stiffness are compared with different static supply pressures. The net force from the thrust bearings can be calculated for different combinations of bearing clearance and supply pressure.
TI - Numerical analysis of the static performance of an annular aerostatic gas thrust bearing applied in the cryogenic turbo-expander of the EAST subsystem
JF - Plasma Science and Technology
DO - 10.1088/2058-6272/19/2/025604
DA - 2017-02-01
UR - https://www.deepdyve.com/lp/iop-publishing/numerical-analysis-of-the-static-performance-of-an-annular-aerostatic-GwqwVud9nn
SP - 025604
VL - 19
IS - 2
DP - DeepDyve
ER -